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A Boston police officer has filed a restraining order against another officer in the department, alleging that he sexually assaulted her - possibly impregnating her - and then stalked her, according to court records.

The accusation has roiled the department, which is investigating the allegations, according to several law enforcement officials with knowledge of the case.

Both officers have been temporarily stripped of their guns and have been asked to stay away from the department during the investigation, but no one has been disciplined, according to the officials, who spoke on the condition of anonymity because they are not authorized to talk to the media about the case.

The Globe is withholding the names of both officers. The newspaper does not name people who allege they have been sexually assaulted. The accused officer’s name is being withheld because he has not been charged with a crime or disciplined by the department.

“I cannot confirm or deny the existence of an investigation,’’ she said.

The allegations surfaced late last week, when the female officer or someone close to her told department officials about the alleged assault, according to one of the officials.

According to records in Dorchester District Court, she filed a restraining order on Monday.

In the complaint, she alleged that on Aug. 25 the officer “forcibly raped me and threatened my life, my husband’s life, and my job.’’

“He has continually threatened to kill my husband, has been physically violent with me, and has consistently put me in fear of my life and safety due to his threats and position’’ within the department, she wrote.

The officer is part of the department’s elite mobile operations unit, which includes sniper, dive, and SWAT teams.

Thomas Drechsler, a Boston lawyer who often represents patrol officers in the department, was listed in court records as the accused officer’s attorney. Drechsler declined to comment yesterday. The officer could not be reached for comment.

Reached at home, the female officer declined to comment.

Boston police officers came to her apartment Thursday to remove her gun, according to the officials.

As she handed them the weapon, the gun accidentally discharged, the officials said, but no one was injured.

The restraining order is set to expire today. The affidavit attached to it is brief but explosive in what it alleges and intimates in its details.

In the affidavit, the female officer said that after the assault, the officer continued to harass her.

She wrote that he came to her home last Thursday and then again on Friday afternoon, right after the investigation into her allegations began.

“As a result of the sexual assault that occurred, I fear that I’m carrying his child,’’ she wrote. “He has threatened me to keep and bear the child.’’

The order forbids the accused officer from coming within 100 yards of the female officer’s home and from going to 1 Schroeder Plaza, the address of the Boston Police Department.

Globe correspondent Stephen Kurkjian contributed to this report. Maria Cramer can be reached at mcramer@globe.com.